An interesting discussion I observed with amusement...
I cannot resist anymore to make an almost serious comment.
Technically, the climbing (or let's call it happy hopping

) is quite interesting on the bamboo like trees in Ojaveda. It takes a bit of human skill to reach the tree tops in a short time.
To keep the nonsense factor a bit lower, you could restrict your event to drifters and RP that the contest is not about riding, but dressage ... without the weight of a rider, a drifter looks well capable to make some impressive leaps. Okay, that would be a contradiction to the models shown, and some people dislike when RP differs from what the engine shows us. I don't know how restrictive the policies are, but if you make a very kind request, some GM might consider to morph the contestants characters into groffles. At least, that would look excellent to RP familiar dressage, wouldn't it?